CN112123948A - Printing head module and ink-jet printing method - Google Patents
Printing head module and ink-jet printing method Download PDFInfo
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- CN112123948A CN112123948A CN202011044177.3A CN202011044177A CN112123948A CN 112123948 A CN112123948 A CN 112123948A CN 202011044177 A CN202011044177 A CN 202011044177A CN 112123948 A CN112123948 A CN 112123948A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/07—Ink jet characterised by jet control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/07—Ink jet characterised by jet control
- B41J2/11—Ink jet characterised by jet control for ink spray
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/007—Digital printing on surfaces other than ordinary paper on glass, ceramic, tiles, concrete, stones, etc.
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Ink Jet (AREA)
Abstract
The application discloses beat printer head module carries out inkjet printing to the base plate under print platform control system's control, it includes to beat printer head module: the printing nozzle, the height detection sensor and the feedback system are arranged on the printing head; the printing head module obtains the distance between the printing nozzle and the substrate through the measurement of the height detection sensor, and the printing ink jetting time is adjusted through the distance between the printing nozzle and the substrate so as to reduce printing errors. The application also discloses an ink-jet printing method using the printing head module. The application provides a beat printer head module can be according to printing the in-process because the actual distance between base plate and the printing nozzle adjusts printing ink and spouts the time, reduces and prints the error.
Description
Technical Field
The application relates to the technical field of OLED, especially relates to the technical field of inkjet printing, and specifically relates to a printing head module and an inkjet printing method.
Background
The development trend of the OLED is towards the direction of ink-jet printing, wherein the ink-jet printing is to drop printing ink drop by drop into a groove of a pixel definition layer, and then the printing ink is dried and baked to form a film; therefore, the accuracy and precision of the printing position are high.
The coefficient of expansion of the glass and the flatness of the glass substrate support also have a large impact on the printing accuracy. Some printer tables support the glass substrate in an air floating manner in order to reduce uneven ink droplets and improve the flatness of the glass substrate support. Although the air floatation device can counteract the gravity of the glass, the warpage of the substrate caused by the stress between the film layers cannot be controlled. A larger warp will cause a corresponding error in printing.
Therefore, it is desirable to provide a printhead module that can improve the printing error caused by the variation of the distance between the substrate and the printing head during the printing process.
Disclosure of Invention
The embodiment of the application provides a beat printer head module and inkjet printing method, utilize the printer head module of this application to scan the height between base plate and the print head before printing, feed back to print platform control system, and then adjust printing ink and spout time, reduce and print the error.
The embodiment of the application provides a beat printer head module, carries out the inkjet printing to the base plate under print platform control system's control, it includes to beat printer head module: the printing nozzle, the height detection sensor and the feedback system are arranged on the printing head;
the printing head module obtains the distance between the printing nozzle and the substrate through the measurement of the height detection sensor, and the printing ink jetting time is adjusted through the distance between the printing nozzle and the substrate so as to reduce printing errors.
In some embodiments, the printhead module further includes an ink circulation system, an inkjet control system.
In some embodiments, the printhead module further comprises a temperature control system.
In some embodiments, the height detection sensor measures a height between the substrate and the print head before printing.
In some embodiments, the feedback system feeds back the height between the print head and the substrate to the print platform control system, and then adjusts the print ink spitting time through the calculation of the inkjet control system to reduce printing errors.
In some embodiments, the relative position of the height detection sensor and the print head is fixed.
In some embodiments, the height detection sensor obtains the distance from the substrate by laser measurement, thereby obtaining the relative distance between the print head and the substrate.
In some embodiments, the height detection sensor further has a substrate impurity detection function of detecting whether large-particle impurities exist on the substrate while measuring the height, so as to reduce the damage of the substrate and the risk of the print head.
In some embodiments, the data measured by the height detection sensor is introduced into a printing algorithm in the ink jet control system, and the ink droplet ejection time is controlled by the ink circulation system after calculation, so that the printing error is improved. For example, if the height of the print head from the substrate increases, the drop time of the ink droplet increases, and the print head needs to eject ink earlier (time compensation) to ensure that the ink can be accurately dropped at a specific position; on the contrary, the distance from the printing nozzle to the substrate is reduced, so that the falling time of ink droplets is shortened, and the printing nozzle needs to eject ink later so as to ensure that the ink can be accurately dropped at a specified position.
The embodiment of the application provides an inkjet printing method using the printing head module, which comprises the following steps:
sending the substrate into a printer table and placing the substrate on a printing platform, and detecting actual distances between different positions of the substrate and a printing nozzle through the height detection sensor; meanwhile, whether large-particle impurities exist or not is checked through the height detection sensor, and data point positions are recorded, so that the substrate and the printing nozzle are prevented from being damaged in the printing process, and the printing yield is improved;
feeding the measured data back to a printing platform control system through a feedback system, controlling an ink circulation system according to a calculation result after the calculation of an ink jet control system, and printing a substrate, wherein the height error between the substrate and a printing nozzle is improved by adjusting the spraying time of printing ink in the printing process;
after printing is finished, the substrate is withdrawn from the printing machine to carry out the next process; and the system records the substrate warping data and the adjusting mode and refers to the same type of substrate so as to reduce the next calculation and printing time.
In some embodiments, in the inkjet printing method, if the distance between the print head and the substrate increases, that is, the ink drop landing time increases, the print head needs to eject ink earlier to ensure that the ink drop lands accurately at the specified position.
In some embodiments, in the inkjet printing method, if the distance between the print head and the substrate is reduced, that is, the ink drop landing time is shortened, the print head needs to eject ink later to ensure that the ink drop lands on the specified position accurately.
The printing head module can improve the error caused by the change of the distance between the substrate and the printing head in the printing process.
The relative position of the height detection sensor and the printing nozzle is fixed, and the distance between the height detection sensor and the substrate is detected through laser so as to obtain the relative distance between the printing nozzle and the substrate.
In the invention, the warping rates of the substrates of different products are different greatly, and the warping conditions of the substrates of the same type are similar, so that the relevant data of the adjusting distance is collected after one-time printing is finished, and the time for next-time printing and height adjusting can be reduced.
According to the invention, the height detection sensor can be combined with the substrate impurity detection function, so that whether large-particle impurities exist in the substrate is detected while the height is measured, and the risks of damaging the substrate and the printing nozzle are reduced.
The beneficial effect of this application lies in:
the printhead module that this application embodiment provided can improve the error that the change of printing in-process because distance between base plate and the printing shower nozzle produced. The utility model provides a beat printer head module, scan the height between base plate and the print head before printing to feed back to print platform control system, through inkjet control system's calculation, adjust printing ink and spout the time and reduce the printing error.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
FIGS. 1A and 1B are schematic diagrams illustrating an inkjet printing process of a printing head on a substrate according to an embodiment of the present disclosure; wherein, FIG. 1A is a schematic diagram of ink drops just landed at a designated position, and FIG. 1B is a schematic diagram of ink drops not landed at a designated position to generate a printing error; in the figure, H, H' is the distance between the print head 1 and the substrate 10; x is the moving direction of the substrate; y is the drop falling direction.
Fig. 2A is a schematic structural diagram of a positional relationship between a printhead module and a substrate according to an embodiment of the present disclosure.
Fig. 2B is a schematic structural diagram of a positional relationship between the print head and the height detection sensor in the embodiment of the present application.
Fig. 2C is a schematic structural view of a positional relationship between the height detection sensor and the substrate in the embodiment of the present application.
Fig. 3 is a schematic perspective view of fig. 2C.
FIG. 4 is a schematic diagram of print time compensation for different heights during inkjet printing according to an embodiment of the present disclosure; in the figure, T is time offset.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," "third," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
In this patent document, the drawings discussed below and the embodiments used to describe the principles of the present disclosure are by way of illustration only and should not be construed in any way to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present invention may be implemented in any suitably arranged system. Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. Further, a terminal according to an exemplary embodiment will be described in detail with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements.
The terms used in the description of the present invention are only used to describe specific embodiments, and are not intended to show the concept of the present invention. Unless the context clearly dictates otherwise, expressions used in the singular form encompass expressions in the plural form. In the present specification, it is to be understood that terms such as "comprising," "having," and "containing" are intended to specify the presence of stated features, integers, steps, acts, or combinations thereof, as taught in the present specification, and are not intended to preclude the presence or addition of one or more other features, integers, steps, acts, or combinations thereof. Like reference symbols in the various drawings indicate like elements.
The invention is further described with reference to the following figures and specific embodiments:
fig. 1A and 1B are schematic diagrams illustrating an inkjet printing process performed on a substrate by a printing nozzle in an embodiment of the present application. Wherein, fig. 1A is a schematic view of an ink droplet just landed at a designated position; fig. 1B is a schematic view showing that the print error generation ink droplet does not land to the specified position. In the figure, H, H ' is the distance between the print head 1 and the substrate 10, H is increased to H ', and H ' is greater than H; x is the moving direction of the substrate 10; y is the drop 11 falling direction.
The embodiment of the application provides a beat printer head module, carries out the inkjet to base plate 10 under print platform control system's control and prints, it includes to beat printer head module: the printing device comprises a printing nozzle 1, a height detection sensor 2 and a feedback system 3;
the printing head module obtains the distance between the printing nozzle 1 and the substrate 10 through the measurement of the height detection sensor 2, and the printing ink jetting time is adjusted through the distance between the printing nozzle 1 and the substrate 10 so as to reduce the printing error.
In some embodiments, the printhead module also includes an ink circulation and control system 4. The ink circulation and control system 4 comprises an ink circulation system 6 and an ink jet control system 7.
In some embodiments, the printhead module further includes a temperature control system 5.
In some embodiments, the height detection sensor 2 measures the height between the substrate 10 and the print head 1 before printing.
In some embodiments, the feedback system feeds back the height between the print head 1 and the substrate 10 to the print platform control system, and then adjusts the printing ink spitting time through the calculation of the inkjet control system 7 to reduce the printing error.
In some embodiments, the relative position of the height detection sensor 2 and the print head 1 is fixed.
The height detection sensor 2 obtains the distance from the substrate 10 through laser measurement, and then the relative distance between the printing nozzle 1 and the substrate 10 can be obtained.
In some embodiments, the height detection sensor 2 further has a substrate impurity detection function for detecting whether large particle impurities exist on the substrate 10 while measuring the height, so as to reduce the damage of the substrate 10 and the risk of the print head 1. The substrate is inspected for impurities using, for example, a CCD.
Further, the data measured by the height detection sensor 2 is introduced into a printing algorithm, and the printing error caused by the height is improved by controlling the ink droplet ejection time. Please refer to fig. 1A and fig. 1B.
For example, if the distance H between the print head 1 and the substrate 10 is increased, the drop time of the ink droplet 11 is increased, and the print head 1 needs to eject ink earlier (time compensation) to ensure that the ink droplet 11 can accurately drop at a specific position, i.e., the pixel definition layer groove 20; on the contrary, if the height H of the print head 1 from the substrate 10 is reduced, the drop time of the ink drop is shortened, and the print head 1 needs to eject ink later, so as to ensure that the ink drop 11 can be accurately dropped into the pixel definition layer groove 20.
An embodiment of the present invention further provides an inkjet printing method using the printhead module, please refer to fig. 2A, fig. 2B, fig. 2C, fig. 3, and fig. 4, which includes the following steps:
a substrate 10 is sent into a printer table and placed on a printing platform 30, and the actual distances between different positions of the substrate and a printing nozzle are detected through the height detection sensor 2; meanwhile, whether large-particle impurities exist or not is checked through the height detection sensor 2, and data point positions are recorded, so that the substrate 10 and the printing nozzle 1 are prevented from being damaged in the printing process, and the printing yield is improved;
feeding the measured data back to a printing platform control system through a feedback system 3, controlling an ink circulation system 6 according to a calculation result after calculation of an ink jet control system 7, and performing ink jet printing on a substrate 10, wherein a printing error caused by the height between the substrate 10 and the printing nozzle 1 is improved by adjusting the jet time of printing ink in the printing process;
after printing is finished, the substrate 10 is taken out of the printing machine to carry out the next manufacturing process; and the system records the substrate warping data and the adjusting mode and refers to the same type of substrate so as to reduce the next calculation and printing time.
In some embodiments, in the inkjet printing method, if the distance between the print head 1 and the substrate 10 increases, that is, the drop time of the ink droplet 11 becomes longer, the print head 1 needs to eject the ink earlier to ensure that the ink droplet 11 is accurately dropped on a specified position, such as the pixel definition layer groove 20.
In some embodiments, in the inkjet printing method, if the distance between the print head 1 and the substrate 10 is reduced, that is, the drop time of the ink droplet 11 is shortened, the print head 1 needs to eject the ink later to ensure that the ink droplet 11 is accurately dropped on a specified position, such as the pixel definition layer groove 20.
In some embodiments, after the substrate 10 enters a printer platform and is placed on a printing platform 30, the height detection sensor 2 is used to detect actual distances between different positions of the substrate 10 and the printing nozzles 1; meanwhile, the CCD is used for checking whether large-particle impurities exist or not, data point positions are recorded, damage to the substrate 10 and the printing nozzle 1 is avoided, and the printing yield is improved;
the measured data is led into a printing algorithm, and the height error is improved by controlling the droplet ejection time; specifically, if the height of the print head 1 from the substrate 10 increases, the drop time of the ink droplet 11 increases, and the print head 1 needs to eject the ink earlier (time compensation) to ensure that the ink droplet 11 is accurately dropped at a specific position (the pixel definition layer groove 20), and vice versa;
after printing, the substrate 10 exits the printer, and the next process is performed, the system records the warping data of the substrate 10 and the adjustment mode is the same type of substrate as reference, so that the next calculation and printing time is reduced.
To sum up, among the printer head module of this application, through measuring the height between base plate and the print head and feeding back to print platform control system, adjust printing ink and spout time (time compensation) and can effectively reduce the printing error.
The foregoing detailed description is directed to a printhead module and an inkjet printing method provided in an embodiment of the present application, and specific examples are used herein to explain the principles and embodiments of the present application, and the description of the foregoing embodiments is only used to help understand the technical solutions and their core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. The utility model provides a beat printer head module, carries out inkjet printing to the base plate under print platform control system's control, its characterized in that, it includes to beat printer head module: the printing nozzle, the height detection sensor and the feedback system are arranged on the printing head;
the printing head module obtains the distance between the printing nozzle and the substrate through the measurement of the height detection sensor, and the printing ink jetting time is adjusted through the distance between the printing nozzle and the substrate so as to reduce printing errors.
2. The printhead module of claim 1, further comprising: an ink circulation system, an ink jet control system, or a temperature control system.
3. The printhead module of claim 2 wherein the feedback system feeds back the height between the print head and the substrate to the platen control system and then adjusts the print ink firing time as calculated by the inkjet control system.
4. The printhead module according to any of claims 1 to 3, wherein the relative position of the height detection sensor and the print head is fixed.
5. The printhead module of claim 4 wherein the height detection sensor obtains the distance from the substrate by laser measurement to obtain the relative distance of the print head from the substrate.
6. The printhead module according to any of claims 1 to 3, wherein the height sensor further has a substrate impurity detection function for detecting whether large particle impurities exist on the substrate while measuring the height, so as to reduce the risk of damage to the substrate and the risk of the print head.
7. The printhead module of claim 6 wherein data from said height detection sensor is directed to a printing algorithm in said ink jet control system to control ink drop firing time through said ink circulation system to improve print errors.
8. An inkjet printing method using the printhead module according to any one of claims 1 to 7, comprising the steps of:
sending the substrate into a printer table and placing the substrate on a printing platform, and detecting actual distances between different positions of the substrate and a printing nozzle through the height detection sensor; meanwhile, whether large-particle impurities exist or not is checked through the height detection sensor, and data point positions are recorded, so that the substrate and the printing nozzle are prevented from being damaged in the printing process, and the printing yield is improved;
feeding the measured data back to a printing platform control system through a feedback system, controlling an ink circulating system according to a calculation result after the calculation of an ink jet control system, and printing a substrate, wherein a printing error caused by the height between the substrate and a printing nozzle is improved by adjusting the spraying time of printing ink in the printing process;
after printing is finished, the substrate is withdrawn from the printing machine to carry out the next process; and the system records the substrate warping data and the adjusting mode and refers to the same type of substrate so as to reduce the next calculation and printing time.
9. The inkjet printing method according to claim 8, wherein if a distance between the print head and the substrate is increased, that is, if a drop landing time is increased, the print head needs to eject ink earlier to ensure that ink drops are landed at a specified position accurately.
10. The inkjet printing method according to claim 8, wherein if a distance between the print head and the substrate is reduced, that is, if a drop landing time is shortened, the print head needs to eject ink later to ensure that ink drops are landed at a specified position accurately.
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| CN202011044177.3A CN112123948A (en) | 2020-09-28 | 2020-09-28 | Printing head module and ink-jet printing method |
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| CN112895723A (en) * | 2021-01-18 | 2021-06-04 | 合肥京东方卓印科技有限公司 | Ink-jet printing device, method, computer equipment and storage medium |
| CN115854888A (en) * | 2023-03-01 | 2023-03-28 | 季华实验室 | Distance measuring mechanism, distance measuring method and related equipment |
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| CN115854888B (en) * | 2023-03-01 | 2023-05-05 | 季华实验室 | Ranging mechanism, ranging method and related equipment |
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